Natural killer cells are capable of ____

a. stimulating T cell memory
b. killing bacteria in the interstitial fluid
c. destroying body cells lacking MHC markers
d. shutting down adaptive immune responses
e. destroying parasites in the bloodstream


ANSWER: c

Biology & Microbiology

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Picea glauca is a seed-bearing plant. What other characteristic MUST be true of this species?

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Pinocytosis and phagocytosis are accomplished in the cell by the ____

a. nucleus b. lysosome c. endoplasmic reticulum d. plasma membrane e. mitochondria

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Four of the five answers listed below possess

some type of coelom. Select the EXCEPTION.

a. crustaceans b. annelids c. arthropods d. mollusks e. cnidarians

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Which disease has been eliminated through the use of vaccines?

A) tuberculosis B) measles C) rubella D) smallpox E) influenza

Biology & Microbiology